Texas Mold Remediation Contractor Exam Practice
Questions | QUESTIONS AND ANSWERS | 2025/2026 |
Latest EDITION| Instant download!!
1. What is the primary purpose of a mold remediation contractor?
A. Design HVAC systems
B. Remove and prevent mold contamination in buildings
C. Test soil for chemical contamination
D. Issue building permits
Correct Answer: B
Rationale:
Mold remediation contractors specialize in removing mold, preventing regrowth, and restoring
affected areas.
2. Which moisture level in building materials generally supports mold growth?
A. Less than 10%
B. 15–20%
C. Above 20%
D. None
Correct Answer: C
Rationale:
Mold typically grows when moisture content exceeds 20% in porous building materials.
3. You are preparing a remediation plan for a 2,500 sq ft commercial office with
visible mold on ceiling tiles. What is the first step?
,A. Begin demolition
B. Conduct a moisture and mold assessment
C. Apply biocides immediately
D. Remove HVAC system
Correct Answer: B
Rationale:
Assessment identifies moisture sources, extent of contamination, and appropriate remediation
methods.
4. Scenario: A bathroom wall has mold covering 15 square feet behind drywall.
How should containment be established according to IICRC S520?
A. Full building containment
B. Limited containment with polyethylene sheeting and negative air pressure
C. No containment necessary for <20 sq ft
D. Only PPE for workers
Correct Answer: B
Rationale:
Small areas (<30 sq ft) may use localized containment with negative air pressure to prevent
cross-contamination.
5. What PPE is typically required for moderate mold remediation?
A. Disposable gloves and N95 respirator
B. Full Tyvek suit, half-face respirator with P100 filter, gloves
C. Safety glasses only
D. Hard hat and steel-toe boots
Correct Answer: B
Rationale:
Moderate contamination requires full protective gear to prevent inhalation and contact.
,6. Scenario: A mold remediation contractor measures spore levels pre- and post-
remediation. Pre-remediation spore count: 1,200 spores/m³. Post-remediation:
350 spores/m³. If outdoor baseline is 300 spores/m³, is remediation successful?
A. Yes
B. No
C. Only if biocide was applied
D. Not determinable
Correct Answer: B
Rationale:
Indoor spore counts should approximate outdoor baseline; 350 vs 300 indicates remediation may
require further cleaning.
7. Which of the following is a common source of indoor mold growth?
A. High humidity
B. Leaking pipes
C. Flood damage
D. All of the above
Correct Answer: D
Rationale:
All listed sources provide moisture that supports mold growth.
8. Calculation Question: A water leak affected 600 sq ft of drywall. According to
remediation guidelines, how many 4x8 ft drywall sheets need removal?
A. 18
B. 19
C. 20
D. 21
Correct Answer: C
Rationale:
Each sheet = 32 sq ft; 600 ÷ 32 = 18.75 → round up to 20 sheets.
, 9. Scenario: After mold removal, a remediation contractor observes elevated
humidity (75%) in a basement. What is the MOST appropriate next step?
A. Seal surfaces with paint
B. Install dehumidifiers and monitor until <60%
C. Reinstall drywall immediately
D. Ignore humidity levels
Correct Answer: B
Rationale:
Humidity control is critical to prevent mold regrowth.
10. Which building materials are most susceptible to mold growth?
A. Concrete and metal
B. Wood, drywall, and carpet
C. Glass and tile
D. Brick and stone
Correct Answer: B
Rationale:
Porous organic materials retain moisture, creating an ideal environment for mold.
11. Scenario: A 1,200 sq ft attic shows mold growth. Remediation guidelines
recommend negative air changes at 12 ACH. The contractor installs a 1,000
CFM air scrubber. How many hours are required for one complete air change?
A. 1 hour
B. 0.5 hour
C. 0.25 hour
D. 2 hours
Correct Answer: B
Rationale:
Air changes/hour (ACH) = (CFM × 60) ÷ room volume. Room volume = 1,200 sq ft × 8 ft
ceiling = 9,600 cu ft. One ACH = 9,600 ÷ (1,000 × 60) = 0.16 hours per ACH; for 12 ACH, 12 ×
0.16 ≈ 1.92 hours. Adjusted approximate answer for calculation simplification = 2 hours. (Exact
calculation depends on precise ACH formula.)
Questions | QUESTIONS AND ANSWERS | 2025/2026 |
Latest EDITION| Instant download!!
1. What is the primary purpose of a mold remediation contractor?
A. Design HVAC systems
B. Remove and prevent mold contamination in buildings
C. Test soil for chemical contamination
D. Issue building permits
Correct Answer: B
Rationale:
Mold remediation contractors specialize in removing mold, preventing regrowth, and restoring
affected areas.
2. Which moisture level in building materials generally supports mold growth?
A. Less than 10%
B. 15–20%
C. Above 20%
D. None
Correct Answer: C
Rationale:
Mold typically grows when moisture content exceeds 20% in porous building materials.
3. You are preparing a remediation plan for a 2,500 sq ft commercial office with
visible mold on ceiling tiles. What is the first step?
,A. Begin demolition
B. Conduct a moisture and mold assessment
C. Apply biocides immediately
D. Remove HVAC system
Correct Answer: B
Rationale:
Assessment identifies moisture sources, extent of contamination, and appropriate remediation
methods.
4. Scenario: A bathroom wall has mold covering 15 square feet behind drywall.
How should containment be established according to IICRC S520?
A. Full building containment
B. Limited containment with polyethylene sheeting and negative air pressure
C. No containment necessary for <20 sq ft
D. Only PPE for workers
Correct Answer: B
Rationale:
Small areas (<30 sq ft) may use localized containment with negative air pressure to prevent
cross-contamination.
5. What PPE is typically required for moderate mold remediation?
A. Disposable gloves and N95 respirator
B. Full Tyvek suit, half-face respirator with P100 filter, gloves
C. Safety glasses only
D. Hard hat and steel-toe boots
Correct Answer: B
Rationale:
Moderate contamination requires full protective gear to prevent inhalation and contact.
,6. Scenario: A mold remediation contractor measures spore levels pre- and post-
remediation. Pre-remediation spore count: 1,200 spores/m³. Post-remediation:
350 spores/m³. If outdoor baseline is 300 spores/m³, is remediation successful?
A. Yes
B. No
C. Only if biocide was applied
D. Not determinable
Correct Answer: B
Rationale:
Indoor spore counts should approximate outdoor baseline; 350 vs 300 indicates remediation may
require further cleaning.
7. Which of the following is a common source of indoor mold growth?
A. High humidity
B. Leaking pipes
C. Flood damage
D. All of the above
Correct Answer: D
Rationale:
All listed sources provide moisture that supports mold growth.
8. Calculation Question: A water leak affected 600 sq ft of drywall. According to
remediation guidelines, how many 4x8 ft drywall sheets need removal?
A. 18
B. 19
C. 20
D. 21
Correct Answer: C
Rationale:
Each sheet = 32 sq ft; 600 ÷ 32 = 18.75 → round up to 20 sheets.
, 9. Scenario: After mold removal, a remediation contractor observes elevated
humidity (75%) in a basement. What is the MOST appropriate next step?
A. Seal surfaces with paint
B. Install dehumidifiers and monitor until <60%
C. Reinstall drywall immediately
D. Ignore humidity levels
Correct Answer: B
Rationale:
Humidity control is critical to prevent mold regrowth.
10. Which building materials are most susceptible to mold growth?
A. Concrete and metal
B. Wood, drywall, and carpet
C. Glass and tile
D. Brick and stone
Correct Answer: B
Rationale:
Porous organic materials retain moisture, creating an ideal environment for mold.
11. Scenario: A 1,200 sq ft attic shows mold growth. Remediation guidelines
recommend negative air changes at 12 ACH. The contractor installs a 1,000
CFM air scrubber. How many hours are required for one complete air change?
A. 1 hour
B. 0.5 hour
C. 0.25 hour
D. 2 hours
Correct Answer: B
Rationale:
Air changes/hour (ACH) = (CFM × 60) ÷ room volume. Room volume = 1,200 sq ft × 8 ft
ceiling = 9,600 cu ft. One ACH = 9,600 ÷ (1,000 × 60) = 0.16 hours per ACH; for 12 ACH, 12 ×
0.16 ≈ 1.92 hours. Adjusted approximate answer for calculation simplification = 2 hours. (Exact
calculation depends on precise ACH formula.)
